# Nurikabe

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Nurikabe is a logic puzzle with a bit complicated rules and challenging solutions.

The rules are not so simple. :)
You have a grid of squares Some cells of the grid start containing numbers. The goal is to determine whether each of the cells of the grid is "black" or "white" (Islands in the Stream calls these "water" and "land" respectively). The black cells form "the nurikabe" (Islands in the Stream calls it "the stream"): they must all be orthogonally contiguous (form a single polyomino), number-free, and contain no 2x2 or larger solid rectangles (Islands in the Stream calls such illegal blocks "pools"). The white cells form "islands" (which is where Islands in the Stream got its name): each number n must be part of an n-omino composed only of white cells. All white cells must belong to exactly one island; islands must have exactly one numbered cell. Solvers will typically shade in cells they have deduced to be black and dot (non-numbered) cells deduced to be white.
Left click on a square to make it black. Right click to mark with dot. Click and drag to mark more than one square.

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This Month
1. vowels
181
00:29.73
2. haramey
58
00:31.98
3. kbdude8 00:57.71
4. DaveS91 01:27.30
5. s56squared 01:31.53
6. TashiroMiraki
153
01:35.49
7. Hanou
12
01:41.30
8. BobTheJedi
30
01:43.57
9. bonk
64
02:01.30
10. Dorice
169
02:03.33
11. bundtcake
11
02:06.04
12. sredmond
54
02:09.75
13. Kenolo353
57
02:12.57
14. Solander 02:15.60
15. ambiorix 02:18.85
16. boop
43
02:24.96
17. EddyKeddy 02:44.13
18. stlind
17
02:49.57
19. da32s1da
15
02:56.56
20. BeccaWorm
43
03:06.86
This Week
1. vowels
181
00:29.73
2. kbdude8 00:57.71
3. DaveS91 01:27.30
4. s56squared 01:41.55
5. Hanou
12
01:43.18
6. BobTheJedi
30
01:43.57
7. sredmond
54
02:09.75
8. Solander 02:15.60
9. BeccaWorm
43
03:06.86
10. charlesa 03:11.97
11. Speedygoofers
3
05:42.12
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MO3
1. bearn
139
00:22.22
2. sfumato
161
00:26.65
3. Douglas Shamlin Jr.
457
00:32.25
4. vowels
181
00:34.56
5. mediteran13
54
00:35.13
6. numbrr
152
00:37.24
7. EinsteinsBarber
101
00:46.59
8. haramey
58
00:47.01
9. qqwref
230
00:47.72
10. BingBongBob
89
01:06.76
AO5
1. bearn
139
00:24.31
2. sfumato
161
00:28.12
3. Douglas Shamlin Jr.
457
00:31.44
4. vowels
181
00:34.56
5. numbrr
152
00:38.65
6. mediteran13
54
00:42.16
7. haramey
58
00:47.01
8. EinsteinsBarber
101
00:48.52
9. qqwref
230
00:52.22
10. Tristal
47
01:08.63
AO12
1. bearn
139
00:27.22
2. sfumato
161
00:33.67
3. Douglas Shamlin Jr.
457
00:36.08
4. numbrr
152
00:41.62
5. vowels
181
00:41.96
6. haramey
58
00:51.56
7. EinsteinsBarber
101
00:56.39
8. qqwref
230
01:04.48
9. Tristal
47
01:15.54
10. TostiMaker
27
01:16.01
Robots / programmatic solversinfo
1.4s4f400:00.373
2.Charlie Li
60
00:00.485
3.nbjohnson00:00.735

* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
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2023-03-30 12:10:40

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